I was planning on going to a conveyer belt type sushi place on my last night in Tokyo 3 days ago, but it was not meant to be. The snow/ice was so fierce and the icing on ground so intense that both the ones I had planned on going were closed.
The following day I was carrying a massive backpack and navigating the ice on the ground; thank god for clear skies that morning and shopkeepers/houseowners shovelling away! There were slight delays on many of the lines, but the only reason I was a little later than scheduled was because I sat past Nippori on the Yamanote line. I was more than 10 minutes away by the time my brain processed my mistake!